Toyota Tundra (2015 year). Manual — part 346
A
TESTER
DISPLAY
TEST PART
CONTROL RANGE
DIAGNOSTIC NOTE
down
HINT:
This test can be conducted when the vehicle speed is 50 km/h (30 mph) or less.
The 4th to 5th and 5th to 6th up-shifts must be performed with the accelerator pedal released.
The 6th to 5th and 5th to 4th down-shifts must be performed with the accelerator pedal released.
Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively.
The shift position commanded by the ECM is shown in the Data List display on the Techstream.
The shift solenoid valve S2 turns ON/OFF normally when the shift lever is in D.
ECM gear shift command
1st
2nd
3rd
4th
5th
6th
Shift solenoid valve S2
ON
ON
OFF
OFF
OFF
ON
PROCEDURE
1.
CHECK DTC OUTPUT (IN ADDITION TO DTC P0756)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read the DTCs using the Techstream.
Result
RESULT
PROCEED TO
Only P0756 is output
A
P0756 and other DTCs are output
B
HINT:
If any other codes besides P0756 are output, perform troubleshooting for those DTCs first.
B
GO TO DTC CHART
2.
INSPECT SHIFT SOLENOID VALVE S2
A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
OK
(a) Remove shift solenoid valve S2.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION SPECIFIED CONDITION
Shift solenoid valve S2 connector terminal - Shift solenoid valve S2 body
20°C (68°F)
11 to 15 Ω
(c) Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an
operating noise.
OK:
MEASUREMENT CONDITION
SPECIFIED CONDITION
Battery positive (+) → Shift solenoid valve S2 connector
Battery negative (-) → Shift solenoid valve S2 body
Valve moves and makes an operating noise
Text in Illustration
*a
Component without harness connected
(Shift Solenoid Valve S2)
NG
REPLACE SHIFT SOLENOID VALVE S2
3.
INSPECT TRANSMISSION VALVE BODY ASSEMBLY
NG
REPAIR OR REPLACE TRANSMISSION VALVE BODY
ASSEMBLY
OK
REPAIR OR REPLACE AUTOMATIC TRANSMISSION
ASSEMBLY
A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000W81073X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0761; Shift Solenoid "C"
Performance (Shift Solenoid Valve S3); 2015 MY Tundra [08/2014 - ]
DTC
P0761
Shift Solenoid "C" Performance (Shift Solenoid Valve S3)
DESCRIPTION
The ECM uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear
position (1st, 2nd, 3rd, 4th, 5th or 6th gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
CODE
DTC DETECTION CONDITION
TROUBLE AREA
P0761
S3 stuck ON malfunction*1:
When the ECM directs the transmission to switch to 5th
or 6th gear, the engine overruns (clutch slips).
The ECM determines there is a malfunction when either
(a) When the ECM directs the transmission to switch to 4th
gear, the actual gear is shifted to 3rd.
(b) When the ECM directs the transmission to switch to 5th
gear, the engine overruns (clutch slips).
Shift solenoid valve S3
remains closed
Shift solenoid valve SLT
remains closed
Valve body is blocked
Automatic transmission
(clutch, brake, gear, etc.)
P0761
S3 stuck OFF malfunction*2:
Shifting to 1st, 2nd and 3rd gears is impossible.
The ECM determines there is a malfunction when the
following conditions are both met (2-trip detection
logic):
(a) When the ECM directs the transmission to switch to 2nd
gear, the actual gear is shifted to 4th.
(b) When the ECM directs the transmission to switch to 6th
gear, the actual gear is shifted to 6th.
Shift solenoid valve S3
remains open
Valve body is blocked
Automatic transmission
(clutch, brake, gear, etc.)
HINT:
1st
2nd
3rd
4th
5th
6th
*1: Actual gear position under S3 stuck ON malfunction
1st
2nd
3rd
3rd
N*
N*
*2: Actual gear position under S3 stuck OFF malfunction
3rd
4th
4th
4th
5th
6th
N*: Neutral
Gear position during fail-safe operation:
A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
If any malfunction is detected, the ECM changes into the fail-safe mode to shift into the gear
positions as shown in the table below.
Gear position under normal conditions
1st 2nd 3rd 4th 5th 6th
*1: Actual gear position under fail-safe mode during S3 stuck ON
malfunction
1st 2nd 3rd 3rd 3rd 3rd
*2: Actual gear position under fail-safe mode during S3 stuck OFF
malfunction
3rd 4th 4th 4th 5th 6th
MONITOR DESCRIPTION
by the ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores the DTC.
MONITOR STRATEGY
Related DTCs
P0761: Shift solenoid valve S3/Functional check
Required sensors/Components
Shift solenoid valve S3
Duration
OFF malfunction (A), (B) and ON malfunction (A)
0.4 seconds
ON malfunction (B)
3 seconds
ON malfunction (C)
1 second
MIL operation
2 driving cycles
TYPICAL ENABLING CONDITIONS
All
The monitor will run whenever the following DTCs
are not present
P0717 (Turbine speed sensor circuit)
P0500 (Output speed sensor circuit)
P0327, P0328, P032C, P032D, P0332, P0333, P033C, P033D
(KCS sensor circuit)
Shift solenoid valve S1 circuit
Not circuit malfunction
Shift solenoid valve S2 circuit
Not circuit malfunction
Shift solenoid valve S3 circuit
Not circuit malfunction
Shift solenoid valve S4 circuit
Not circuit malfunction
Shift solenoid valve SR circuit
Not circuit malfunction
Shift solenoid valve SL1 circuit
Not circuit malfunction
Shift solenoid valve SL2 circuit
Not circuit malfunction
ECT (Engine Coolant Temperature) sensor circuit
Not circuit malfunction
A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
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